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tion of terpene, obtained as a white crystalline camphorlike substance; -- called also camphene. By extension, any one of a group of related substances.

A ketone derivative of thiophene obtained as a white crystalline substance, (C4H3S)2.CO, by the action of aluminium chloride and carbonyl chloride on thiophene.

The hypothetical radical C4H3S, regarded as the essential residue of thiophene and certain of its derivatives.

A double benzene and thiophene nucleus, C8H6S, analogous to naphthalene, and like it the base of a large series of derivatives. [Written also thionaphtene.]

Of, pertaining to, or derived from, thiophene; specifically, designating a certain acid analogous to benzoic acid.

A double thiophene nucleus, C6H4S2, analogous to thionaphthene, and the base of a large series of compounds. [Written also thiophtene.]

oily liquid, C4H3S.CH3, analogous to, and resembling, toluene; -- called also methyl thiophene.

Any one of three possible metameric substances, which are dimethyl derivatives of thiophene, like the xylenes from benzene.

See Sphene.

An elementary substance found combined in the minerals manaccanite, rutile, sphene, etc., and isolated as an infusible iron- gray amorphous powder, having a metallic luster. It burns when heated in the air. Symbol Ti. Atomic weight 48.1.

See under Zygosphene.